Income Taxes - Significant Components of Deferred Income Tax Assets (Details) - USD ($) $ in Thousands	Jan. 31, 2023	Jan. 31, 2022
Deferred Tax Assets, Net [Abstract]
Net operating loss carryforwards	$ 14,788	$ 21,558
Research and development credit carryforwards	12,792	9,985
Stock-based compensation	116,798	44,490
Accruals and reserves	39,758	14,475
Deferred revenue	303,167	260,322
Capitalized research expenditures	245,708	131,010
Operating lease liabilities	23,140	25,892
Total deferred tax assets	756,151	507,732
Valuation allowance	(53,570)	(12,605)
Total deferred tax assets net of valuation allowance	702,581	495,127
Deferred Tax Liabilities, Net [Abstract]
Property and equipment and intangible assets	(36,274)	(26,733)
Deferred contract acquisition costs	(89,839)	(62,814)
Operating right-of-use assets	(19,352)	(23,466)
Total deferred tax liabilities	(145,465)	(113,013)
Net deferred tax assets	$ 557,116	$ 382,114